Stanchion base



FIG. 1 is a top perspective view of a stanchion base;

FIG. 2 is a front view of a stanchion base;

FIG. 3 is a rear view of a stanchion base;

FIG. 4 is a top view of a stanchion base;

FIG. 5 is a bottom view of a stanchion base; and,

FIG. 6 is a side view of a stanchion base.

Portions of the figures shown in dashed lines are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a stanchion base, as shown and described. 